<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form id="form" style="width: 50%;">
    <input type="hidden" name="id">
    <div class="form-group">
        <label>用户名称:</label>
        <input name="username"  class="form-control" placeholder="请输入用户名称">
    </div>

    <div class="form-group">
        <label>用户年龄:</label>
        <input name="userage"  class="form-control" placeholder="请输入用户年龄">
    </div>


</form>
</body>
</html>